@article{10_4153_CMB_2003_050_8,
     author = {Billig, Yuly},
     title = {Representations of the {Twisted} {Heisenberg{\textendash}Virasoro} {Algebra} at {Level} {Zero}},
     journal = {Canadian mathematical bulletin},
     pages = {529--537},
     year = {2003},
     volume = {46},
     number = {4},
     doi = {10.4153/CMB-2003-050-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2003-050-8/}
}